import { validationMetadatasToSchemas } from "class-validator-jsonschema";
import { Application } from "express";
import { getMetadataArgsStorage } from "routing-controllers";
import { routingControllersToSpec } from "routing-controllers-openapi";
import * as swaggerUiExpress from "swagger-ui-express";

/**
 * Loader for everything openapi related - from creating the schema to serving it via a static route.
 */
export default async (app: Application) => {
  const storage = getMetadataArgsStorage();
  const schemas = validationMetadatasToSchemas({
    refPointerPrefix: "#/components/schemas/",
  });

  //Spec creation based on the previously created schemas
  const spec = routingControllersToSpec(
    storage,
    {
      routePrefix: "/api"
    },
    {
      components: {
        schemas,
        "securitySchemes": {
          "AuthToken": {
            "type": "http",
            "scheme": "bearer",
            "bearerFormat": "JWT"
          }
        }
      },
      info: {
        description: "The the backend API for the LfK! runner system.",
        title: "LfK! Backend API",
        version: "1.0.0",
      },
    }
  );

  //Options for swaggerUiExpress
  const options = {
    explorer: true,
  };
  app.use(
    "/api/docs",
    swaggerUiExpress.serve,
    swaggerUiExpress.setup(spec, options)
  );
  app.get(["/api/openapi.json", "/api/swagger.json"], (req, res) => {
    res.json(spec);
  });
  return app;
};